File 2365-beam_disasm-Fix-translation-of-bs_get_-2-i... of Package erlang

Overview Repositories Revisions Requests Users Attributes Meta

File 2365-beam_disasm-Fix-translation-of-bs_get_-2-instruction.patch of Package erlang (Revision b1ddc78860c1f178c6361caad002e77d)

Currently displaying revision b1ddc78860c1f178c6361caad002e77d , Show latest

From 42d5a0d6a42960fab3d3c1613a1967809c7a7d93 Mon Sep 17 00:00:00 2001
From: Michael Davis <mcarsondavis@gmail.com>
Date: Thu, 10 Nov 2022 15:38:34 -0600
Subject: [PATCH 5/8] beam_disasm: Fix translation of bs_get_*2 instructions

`beam_validator:vi/2` expects these instructions in the shape

{test,Instruction,Fail,Live,[Ms,Size,Unit,Flags],Dst}

For `bs_get_integer2`, `bs_get_binary2` and `bs_get_float2`.

A similar translation is done by `beam_ssa_codegen:cg_bs_get/3`.

For an example, this listing:

match_string(<<Int/integer>>) -> Int;
    match_string(<<Float/float>>) -> Float;
    match_string(<<Bin/binary>>) -> Bin.

becomes this asm:

{function, match_string, 1, 2}.
      {label,1}.
        {line,[{location,"str.erl",3}]}.
        {func_info,{atom,str},{atom,match_string},1}.
      {label,2}.
        {'%',{var_info,{x,0},[accepts_match_context]}}.
        {test,bs_start_match3,{f,1},1,[{x,0}],{x,1}}.
        {bs_get_position,{x,1},{x,0},2}.
        {test,bs_get_integer2,
              {f,3},
              2,
              [{x,1},
               {integer,8},
               1,
               {field_flags,
                [{anno,[3,{file,"str.erl"}]},unsigned,big]}],
              {x,2}}.
        {test,bs_test_tail2,{f,3},[{x,1},0]}.
        {move,{x,2},{x,0}}.
        return.
      {label,3}.
        {bs_set_position,{x,1},{x,0}}.
        {test,bs_get_float2,
              {f,4},
              2,
              [{x,1},
               {integer,64},
               1,
               {field_flags,
                [{anno,[4,{file,"str.erl"}]},unsigned,big]}],
              {x,2}}.
        {test,bs_test_tail2,{f,4},[{x,1},0]}.
        {move,{x,2},{x,0}}.
        return.
      {label,4}.
        {bs_set_position,{x,1},{x,0}}.
        {test,bs_get_binary2,
              {f,5},
              2,
              [{x,1},
               {atom,all},
               8,
               {field_flags,
                [{anno,[5,{file,"str.erl"}]},unsigned,big]}],
              {x,0}}.
        return.
      {label,5}.
        {bs_get_tail,{x,1},{x,0},2}.
        {jump,{f,1}}.
---
 lib/compiler/src/beam_disasm.erl | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/compiler/src/beam_disasm.erl b/lib/compiler/src/beam_disasm.erl
index 86d15809a5..f7fd1b509c 100644
--- a/lib/compiler/src/beam_disasm.erl
+++ b/lib/compiler/src/beam_disasm.erl
@@ -1054,15 +1054,15 @@ resolve_inst({is_function2=I,Args0},_,_,_) ->
 %%
 resolve_inst({bs_start_match2=I,[F,Reg,{u,Live},{u,Max},Ms]},_,_,_) ->
     {test,I,F,[Reg,Live,Max,Ms]};
-resolve_inst({bs_get_integer2=I,[Lbl,Ms,{u,Live},Arg2,{u,N},{u,U},Arg5]},_,_,_) ->
-    [A2,A5] = resolve_args([Arg2,Arg5]),
-    {test,I,Lbl,[Ms, Live,A2,N,decode_field_flags(U),A5]};
-resolve_inst({bs_get_binary2=I,[Lbl,Ms,{u,Live},Arg2,{u,N},{u,U},Arg5]},_,_,_) ->
-    [A2,A5] = resolve_args([Arg2,Arg5]),
-    {test,I,Lbl,[Ms, Live,A2,N,decode_field_flags(U),A5]};
-resolve_inst({bs_get_float2=I,[Lbl,Ms,{u,Live},Arg2,{u,N},{u,U},Arg5]},_,_,_) ->
-    [A2,A5] = resolve_args([Arg2,Arg5]),
-    {test,I,Lbl,[Ms, Live,A2,N,decode_field_flags(U),A5]};
+resolve_inst({bs_get_integer2=I,[Fail,Ms,{u,Live},Size0,{u,Unit},{u,Flags},Dst0]},_,_,_) ->
+    [Size,Dst] = resolve_args([Size0,Dst0]),
+    {test,I,Fail,Live,[Ms,Size,Unit,decode_field_flags(Flags)],Dst};
+resolve_inst({bs_get_binary2=I,[Fail,Ms,{u,Live},Size0,{u,Unit},{u,Flags},Dst0]},_,_,_) ->
+    [Size,Dst] = resolve_args([Size0,Dst0]),
+    {test,I,Fail,Live,[Ms,Size,Unit,decode_field_flags(Flags)],Dst};
+resolve_inst({bs_get_float2=I,[Fail,Ms,{u,Live},Size0,{u,Unit},{u,Flags},Dst0]},_,_,_) ->
+    [Size,Dst] = resolve_args([Size0,Dst0]),
+    {test,I,Fail,Live,[Ms,Size,Unit,decode_field_flags(Flags)],Dst};
 resolve_inst({bs_skip_bits2=I,[Lbl,Ms,Arg2,{u,N},{u,U}]},_,_,_) ->
     A2 = resolve_arg(Arg2),
     {test,I,Lbl,[Ms,A2,N,decode_field_flags(U)]};
-- 
2.35.3

Places

File 2365-beam_disasm-Fix-translation-of-bs_get_-2-instruction.patch of Package erlang (Revision b1ddc78860c1f178c6361caad002e77d)

Places